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AR# 24379

LogiCORE FIR Compiler V2.0 - When I select multiple coefficient sets I get zero filter output

Description

When I have multiple coefficient sets, I get zero filter outputs. Why?

Solution


This problem occurs when a filter is built that has the following characteristics: 
- uses multiple coefficient sets 
- is symmetric 
- requires multiplier MAC engines 
- is targeted at the Spartan family in which the output from the filter is zero 
 
The solve this problem, make sure the filter response is set to "non_symmetric" even if the coefficients are symmetric.
AR# 24379
Date Created 09/04/2007
Last Updated 05/21/2014
Status Archive
Type General Article